Mold



May 12, 1931. A. 'r. BATEMAN ETAL MOLD Filed July 30, 1928 2 Sheets-Shef 1 album:

2 Sheets-Sheet 2 MOLD Filed July so. 1928 A. T. BATEMAN ET AL May 12, 1931.

l l i l less labor.

Fatented May 12, T5331 resales ARTHUR- T. BATEMAN AND AEDEENV IRVINE, OF DETROIT, IsZTCL-QIGAIQ', ASSIGNOBS TO BOT-EN ALUMINUIVI & BRASS CORPORATION, OF DETROIT, MICHIGAN, A CORPORA- TTON G MICHIGAN MQLD Application filed July 30, 1928.

The invention relates to molds adapted for use in forming metal articles and has been developed in casting from metal of relatively high crystallization shrinkage and low fusii point, such as aluminum or its alloys, articles having curved passages therethrough. such as vacuum cleaner nozzles. Heretofore, vacuum cleaner nozzles have been cast in sand molds and as a consequence the castings were found defective. In addition, the finishing of their external surfaces required considerable lahor resulting in relatively high cost. With our invention the finishing of the external surfaces of the castings require considerably At the same time the passages in these castings may be curved as desired so that no abrupt shoulders will be present.

The invention has for another object to so construct the mold that it may be operated at suflicient speed to maintain the temperature of the mold above a predetermined point so that good castings may he produced. The invention has for further objects to so con struct the mold that the core may be readily inserted and will normally remain in place when the mold sections are separated; to so construct the mold that air and gas may escape from the mold cavity, thereby allowing this cavity to be filled; and to so construct I the mold that the molten metal is initially Serial No. 298,378.

Figure 8 is a rear view thereof with parts broken away.

In the present instance we have shown a mold adapted for use in forming from metal of relatively high crystallization shrinkage and relatively low fusing point, such as aluminum or its alloys, an article having a curved passage therethrough, such as a vacuum cleaner nozzle.

in detail, 1 is a stationary permanent rear section of the mold and 2 a movable per manent front section. These sections are preferably formed from metal of relatively high fusing point. The front sect-ion 2 is pivotally mounted at its lower end upon-the horizontally extending aligned pins 3, which are mounted upon the rear section at the front of its lower end. The rear section 1 has permanently secured thereto the permanent insert at which is preferably formed of the same metal as the sections 1 and 2. The mold further has the permanentside sections or cores 5, which are preferably formed of the same metal as the sections 1 and 2 and are longitudinally slidably mounted upon the rear section 1 to extend above the insert l, These side cores are supported and guided by means of the plates 6, which are fixedly seen ed to the front face of this rear section. The rear section 1, including the insert l, the front section 2 and the side cores 5 are adapt" ed to cooperate to form the mold cavity.

The vacuum cleaner nozzle, which is adapted to he formed in this mold cavity, has. the curved body 6 and the annular flange 7 at one end thereof, the passage through this nozzle being curved with adjacent portions of the wall forming the passage merging into each other to avoid any abrupt shoulders which might interfere with the passage of air and dirt therethrough and collect dirt. The parts of the mold are so arranged that the portion of the mold cavity for forming the annular flange 7 is located at the lower end and the portion of the mold cavity for forming the portion of the body 6, which is uppermost when the nozzle is in use located at the lower side, by reason oi which a good casting may be formed having its external surface. which in use is up -rinost, presenting a. 1' iii"; Edy colored appearance, the molten metal having had an opportunity of reaching a uniform temperature by the time it reaches the lower side oi? the mold rarity. The side cores extending above the insert 4 and cooperating: therewith to term the upper portion of the mold cavity 'or forming part of the annular flange 7 and the adjacent portion of the body ('3; provide for escape of air or gas which mi"-it otherwise be tr: pped in the flange forming portion of the mold cavity, there being sullicient clearance between these side cores and the rear section to permit the escape of: air gas therebetween.

4 8 is a core, comnmnly lcnovn as a sand core. This core has contour such that when it is placed within the mold ca y the 1 roper thickness of the wall of the body 6 is cured. For mounting the core 8 in place the insert 4 is provided with the tape axial opening 9 for engagement w' print 10 at one end of the core. section 1 is provided with the elon i cess 10 at the front side of its upper pm and above the part of the rear s in forming the mold cavity. erably extends laterally hey-on? and the mold cavity forming portioi in gaucable by the elonoatod print end of the core 8 (mpoiine the print if The rear section furthermore occupie'; a posution such that when the core is inserted into place while the front section 2 is the rear section 1 this core natui a in place so that it need int he ll heme; the umiermost 7 also being" expoi' ed. air tlunrihrough while the lilled witl molten metal.

lho rear section is pun gate l2 and lhe ri:- rs l3. ably located herons o niosite e 1 w This {rate ha s one side closed oy l: v but is so lo *ater and inclined tha t section is subjected to the force oi oi the molten metal for filling tlir ity, thereby avoiding to as grea pos. 'ble. the wzshing ot' impiir mold cavity from the core.

The body 6 of the nozzle has adj.- olongate'l opening or me. i

enlargements which are of ribs extending; longitud nally it the opening or mouth proper ffil'llllllflf or filling; out of cl .3 lariminents, we have provided in the rear "nd front mold secti ms 1. and 2. re: iectivm channels 16 and 1 in whicn l are fixedly cured the perm ent inserts l8 and l9, respectively. 'lhese 1 Arts hare he, longitudinally extending); grooves 20 for forming the portions of the mold car for nia -"ng the en- "ai genieni. l of "hose inserts 16 and 17 we "-th the restricted pa.- sages 21 preterably in the nature o'li lilo cuts.

which lead o the liner beveled corners of the inserts. and lare pa. erably formed respectirrly n the rear sect'on l and the front section for cuiducting air and gas which may iaye escaped through the par, ages 21 to points outside the mold. The inserts 1 and 19 are p 'cl'erably formed of the smile metal sections 1 18 is cut away to assist +1 as i re or alloys and also assuming that the front section has been swung forwardly and downwardly sand core 8 is inserted int place by placing its print 10 in the opening 9 and its print 11 in the recess 10, at which time this core, will naturally remain in place and be accurately positioned. The front section 12 is then swung up ardly and rearwa rdl y against he stationary section 1. The side cores are moved longitiulinally inward to positions determined by their end flanges a ter which the ront section is suitably clamped to the rear section. The mold is now in condition to receive molten metal which is poured in through the gate 12 and passes around the core. gradually filling the mold cavity. Any air which. might otherwise 'collect in the portion of the mold for formim); the annular llangi of the article is pern'iitted to escape between the side cores and the rear section and any air which might otherwise ollect in the grooves for forming the elongated enlargements at the opposite sides of the inlet opciing or mouth of the article is permitted to escape between the inserts and the mold sections in which they are located. Owing to the fact that the metal which forms the uppermost part oi? the article when in use has had an opportunity to cool to a uni'liorm temperature, this metal has a better appearance and does not show, at least to as large an extent, variations in color. lVhen the molten metal has cooled sulliciently, the clamps for securing the front section 2 to the rear section 1 are released the side cores are drawn longitudinally out ward and the front section 2 is then swung forwardly and rearwardly, after which the article may be removed.

Owing to the fact that the portion of the mold cavity forming the external surface of the article is permanent and more particularly metallic, the external surface of the article has a better natural finish and does not require nearly as much labor to completely finish the same. However, since a sand core is used, the passage through the article may be curved as desired with adjacent portions merging into each other, thereby avoiding abrupt shoulders.

What we claim as our invention is:

1. A mold adapted for use in forming a vacuum cleaner nozzle having a curved passage therethrough with adjacent portions of the wall forming the passage merging into each other and an annular flange at one end, said mold comprising a stationary permanent section, a pivotal permanent section adapted to cooperate therewith to form an upright mold cavity, the permanent sections occupying a position such that the portion of the mold cavity forming the annular flange of the nozzle is at the lower end of the cavity, one of said permanent sections being provided with gate means communicating with the upper end of the mold cavity and a sand core carried by said stationary section and insertable into place when the permanent sections are separated.

2. A mold adapted for use in forming a flanged article comprising a stationary permanent section, a movable permanent section adapted to be secured against the stationary section and side cores movably mounted upon one of the sections, said sections and cores being adapted to cooperate to form an upright mold cavity with a flange forming portion at the lower end and said cores providing for escape ofair and gas from the flange forming portion, one of said sections being provided with gate means communicating with the upper end of the mold cavity.

A mold adapted for use in forming a flanged article comprising a stationary permanent section, a pivotal permanent section adapted to move through a vertical path and to be secured against the stationary section v and side cores longitudinally slidably mounted upon the stationary section, said sections and cores being adapted to cooperate to form an upright mold cavity with a flange forming portion at the lower end and said core providing for escape of air and gas from the flange forming portion, one of said sections being provided with gate means communicating with the upper end of the mold cavity.

4. A mold adapted for use in forming an article having an elongated opening at one end with an external rib extending longitudi- I nally of and at one side of the opening, said the mold cavity and a core carried by said fixed section and adapted to occupy a predetermined position in the mold cavity, one of the sections having a permanent insert grooved to form the rib and constructed to provide for the escape of air and gas from the groove.

5. A mold for use in forming a vacuum cleaner nozzle having a longitudinallycurved p usage therethrough comprising fixed and movable permanent sections cooperating to form an upright mold cavity increasing in cross-section toward its lower end, gate means communicating with the upper end of the mold cavity and a sand core adapted to occupy a predetermined position in the mold cavity and defining the longitudinally curved passage.

6. A mold for use in forming a vacuum cleaner nozzle having a longitudinally curved passage therethrough comprising a stationary section, a pivotal section adapted to cooperate therewith to form an upright mold cavity increasing in cross-section toward its lower end, gate means communicating with the upper end of said mold cavity and a sand core adapted to be carried by the stationary section and to occupy a predetermined position in the mold cavity and defining the longitudinally curved passage.

7. A mold adapted for use in forming a flanged article comprising a stationary permanent section, a pivotal permanent section adapted to be secured against the stationary section, and side cores movably mounted upon the stationary section, said sections and cores being adapted to cooperate to form an upright mold cavity with the flange forming portion of the cavity partly formed between the stationary section and the side cores mounted thereon.

8. A mold adapted for use in forming an ar 'icle having an outwardly extending flange and a longitudinally curved passage therethrough comprising a stationary permanent section, a pivotal permanent section adapted to be secured against said stationary section, side cores movably mounted upon the stationary section, said sections and cores cooperating to form .an upright mold cavity with the flange forming portion of the cavity partly formed between the stationary section and the side cores mounted thereon, a sand core adapted to occupy a predetermined position in the mold cavity for defining the longitudinally curved passage, and cooperating means upon said core and stationary section beyond the mold cavity for supporting the sand core from the stationary section.

9. A mold adapted for use in forming an article having a passage therethrough and a flange adjacent one end thereoi comprising a stationary permanent section, a pivotal permanent section adapted to be secured against the permanent section, side cores longitudinally slidably'mounted upon the stationary seet'ion, said sections and cores being adapted to cooperate to form an upright mold cavity with a flange forming portion at the lower end thereof, said flange forming portion be ing defined in part by said stationary section and by the side cores movable thereon, and 'a temporary core carried by said stationary section and occupying apredetermined position in the mold cavity for forming the curved passage.

In testimony whereof we afiix our signatures.

ARTHUR T. BATEMAN.

ANDREWV IRVINE. 

